Convertible spiee extractor or lifting jack



(No: Model.) 2 Sheets-She et 1.

0. 1V[.- EDWARDS. I CONVERTIBLE SPIKE EXTRAGTOR 0R LIPTING JACK.

,No. 444,427. Patented Jan. 13, 1891.

(No Modl.) 2 Sheets-Sheet 2.

0. M. EDWARDS.

CONVERTIBLE SPIKE EXTRAOTOR OR LIPTING JACK.

No. 444,427. Patented Jan. 13,1891.

UNITED STATES PATENT OFFICE.

CHARLES M. EDWARDS, OF BLOOMINGBURG, OHIO, ASSIGNOR TO JAMES H. JEFFERSON, OF SAllIE PLACE.

CONVERTIBLE SPlKE-EXTRACTOR OR LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent N 0. 444,427, dated January 13, 1891.

Application filed March 12, 1890. Serial No. 343,581. (No model.)

To all whom it may concern: that the device will work equally well if this Be it known that I, CHARLES M. EDWARDS, arrangement be reversed. a citizen of the United States, residing at The operation of my device is as follows: Bloomingburg, in the county of Fayette and The claw being engaged with the spike to be State of Ohio, have invented certain new and withdrawn or the weight to be lifted being 5 5 useful Improvements in Convertible Spikeapplied, the handle of the lever is depressed. Extractors or Lifting-J acks, of which the fol- The traveling block 011 which the lever or lowing is a specification. pinion is mounted will remain stationary,

My invention relates to improvements in being held by the means provided for pre- IO the construction and operation of liftingventing its retrograde movement, and conjacks, which I will proceed to describe with sequently the rack-bar will be elevated, carryreference to the accompanying drawings, in ing with it the spike or weight and the travwhich- I eling block on which it is mounted. 'When Figure I represents a side View of my liftthe lever has reached the limit of its down- 5 ing-jack. Fig. II is a front view of the same. ward movement, the motion is reversed, when Fig. III shows the upper block with its atthe traveling block carrying the rack-bar betached rack-bar and claw in combination comes stationary and the other traveling with the pinion and handle. Fig. IV and V block is elevated. This process is continued show modifications. until the spike is withdrawn or the load is 2 A A are the two slotted standards mounted raised to the desired height. The traveling in the bifurcated base B and braced above blocks are then lowered by releasing the pawls in any suitable manner. or eccentrics, and the process can be repeated.

0 D are two traveling blocks on the stand-' The pawls or eccentrics used to prevent the ards, and are provided with means for preretrograde movement of the traveling blocks 5 venting retrograde movement thereof. These are provided with wires or yokes S, which means may consist of pawls E engaging with connect each pair of pawls or eccentrics and a ratchet F on the standards, or of any other serve as handles in releasing them from the suitable means, such as eccentrics G, as shown standards. in Fig. V. I have shown and described a lever for 3 H is a rack-bar mounted in one traveling working the pinion; but by using a crank a block and engaging with the other, and is greater range of movement could be obtained, provided with shoulderI for lifting purposes. as the same could then make one or more A claw K, employed in extracting spikes and revolutions. controlled by a detachable handle L, is swung I do not claim, broadly, as of my invention 35 from the rack-bar H. Projecting portions of a standard, traveling blocks, bar, and lever; the travelers may also be used for lifting. but what I do claim is the pair of standards A pinion M, mounted on a pin N, passed in combination with the pair of traveling through the slots in the standards and one blocks with means for preventing retrograde of the traveling blocks, engages with the rackmovement of said blocks, the rack-bar, and

4 bar. A handle 0 is applied to this pinion means for engaging said rack-bar. for operating the device. If desired, a bar P, Having thus described my invention, the carried by the upper traveler, and a lever B, following is what I claim as new therein and fulcrumed on the lower traveler and engagdesire to secure by Letters Patent: ing in said bar, as shown in Fig. V, may be 1. In a lifting device, the combination of 45 substituted for the rack-bar and pinion, a pair of slotted standards having suitable which will give the same results, as the pinratchets, a pair of blocks carrying a rack-bar ion is but a continuously-operating lever. and engaging lever, respectively, and each In the drawings I have shown the rack-bar having passages for the standards, said lever mounted in the upper traveler and the pinion being secured in the block between the stand- 5 or lever in the lower one; but it is obvious ards by a pin passed through the lever, the

block, and the standard-slots, substz'miially rack-bar mounted on the upper block and as set forth. I passing through the lower block, said rack- I 5 2. In the convertible device described, a 1 bar having a shoulder, andapinion mounted swinging claw and a handle for contri'wlling onbearingspassingthrough the slotted stand- 5 the claw. ards and lower traveler, said pinion engaging 3. The convertible device described, comwith the rack-bar and having a suitable conprising, a pair of slotted standards mounted i trolling-handle, all substantially as shown 20 in a bifurcated base, said standards being i and described. provided with rateheis, a pair of traveling i p ,7 IO blocks having openings through which the CHARLES ARDS' standards pass, each block having pawls for \\"itncsses: engagement with said ratchets and suitable i IRA J. GARINGER, controlling-wires attached to the pawls, a I DICK II. DE BRUIN. 

